July 18, 2016 10:10 PM EDT

In an emotionally raw speech, the mother of an American Foreign Service official killed in Benghazi claimed that Hillary Clinton lied to her and argued that Donald Trump would improve national security at the Republican convention Monday.

“I blame Hillary Clinton personally for the death of my son,” said Patricia Smith, whose son Sean was killed in the attack. “How could she do this to me? How could she do this to any American family? Donald Trump is everything Hillary Clinton is not.”

Read Smith’s remarks in full below:

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